My Seagate Expansion 1TB External Hard Disk is having problems. It fell from 1.5 ft. height and from that onwards, the computer is not detecting it and it also auto disconnects itself less than a minute after connecting it. Its a USB 3.0 External HDD. It was once detected and I tried to recover it but it got disconnected. Any solutions please?

Is it under warranty? If not, I would suggest opening up the external casing and take the drive out, use it as a slave drive and see if the data is still there. Most likely, it is a problem with the PVC board.